Aortic Stenosis Can Hide for Years

Know the signs before heart failure occurs.

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May 28, 2026 8:13am EDT

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Aortic stenosis (AS) is the most common valvular heart disease requiring intervention in developed countries, yet it frequently goes unrecognized until patients present with advanced symptoms. With prevalence rising sharply in aging populations, earlier detection in routine care matters.

What makes AS easy to miss:

Early symptoms (reduced exercise tolerance, exertional dyspnea) overlap with heart failure, COPD, and deconditioning
The classic triad of dyspnea, angina, and syncope signals advanced disease, not early disease
Risk factors mirror common cardiovascular comorbidities, blurring clinical attribution

Practical cues to keep on your radar:

Crescendo-decrescendo mid-systolic ejection murmur, best heard at the upper right sternal border with radiation to the carotids, though grade 1–2 murmurs can be easily missed, and traditional auscultation has limited sensitivity for detecting significant valvular heart disease even among experienced clinicians
ECG patterns consistent with left ventricular hypertrophy may raise suspicion in the appropriate clinical context, although there are well-known sensitivity limitations
Bicuspid aortic valve history — the most common predisposition to AS, accounting for the majority of valve replacements under age 60

The takeaway:
AS progresses in nearly all patients once mild obstruction is established, and mortality rises sharply after symptom onset without intervention. Routine auscultation and a low threshold for workup remain critical first steps.

Keep reading for a full clinical overview of aortic stenosis — pathophysiology, progression, auscultation findings, and ECG patterns.

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Aortic Stenosis Can Hide for Years

Know the signs before heart failure occurs.

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